ARM: dts: msm: add various panel properties for SDM855

Add panel properties such as backlight configurations, gpios
and panel power supply for various displays supported by SDM855.

Change-Id: Id3392a59314a68d1777b5a17a9e0a8570dca57a8
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>